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Expired Canadian patentCanada

Power factor monitoring and control system

CA 1162238 A · Owner: Westinghouse Electric Corporation · Inventors: Carter, Woodward C. Ii

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

47,972, ABSTRACT OF THE DISCLOSURE, In a power utilization system having loads drawing energy from a utility company, as part of computerized power demand control system, the power factor is automatically controlled by the computer. Typically compensation capacitors are automatically switched IN or OUT in a selected sequence in accordance with the instantaneously measured lagging KVAR. The power factor is also calculated from the measured KVAR and KW and displayed.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted February 14, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 14, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 3, 1980
GrantedFebruary 14, 1984
Term endedFebruary 14, 2001
Patent numberCA 1162238 A
Classification (IPC)G05F1/70 +2 more

Timeline

Timeline From CIPO dates

1981198419871990199319961999Application filedApril 3, 1980Patent grantedFeb 14, 1984Term endedFeb 14, 2001

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.